I don't know how familiar folks are with this grandad of the Ford type rear axle. It has a third member that holds all the guts just like the later Ford axles. After the axle shafts are pulled and bolts/nuts are removed, the third member should just pull out of the main housing. If the hogs head housing was deformed or one of the caps came loose, there could have been a shift or breakage with the carrier bearing components that won't allow the hogs head to come out. A person might have to destroy the hogs head third member to remove it. That could be quite a job. Pulling the whole axle assembly may not help all that much except for better access to tear into the housing.
I've never seen one of these get wrecked up that bad internally. They usually have problems with the pinion shaft but if it was made by man, it can fail just about any way you could ever imagine.